[Beowulf] Re: multiport RS232 to ethernet (or USB)

[Joel Jaeggli]

On Thu, 6 Apr 2006, Ed Karns wrote:

>
> On Apr 6, 2006, at 12:00 PM, beowulf-request at beowulf.org wrote:
>
>> 
>> And, I suppose one could gang up a raft of $9 USB/Serial dongles on a USB 
>> hub (somehow, I suspect that this is fraught with peril)

we use 16 port rackmount digi edgeport usb-serial adapters

http://www.digi.com/products/usb/edgeport.jsp

The have an onboard usb hub though we haven't found a reason to cascade 
them as yet.

>> The device has to allow independent control of RTS and reading CTS (which 
>> may not be used in the usual flow control scheme)
>
>
> It might be a tall order to get the ":cheap" $9 USB to Serial adapter to do 
> Request to Send / Clear to Send / hardware handshaking ... probably should 
> consider Xon / Xoff / software handshaking instead = not a problem for the 
> least expensive USB to Serial adapters. (Ctrl S / Ctrl Q being easy from the 
> command line or script to get the port to respond.)
>
> Ed Karns
> FireWireStuff.com
>

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Joel Jaeggli  	       Unix Consulting 	       joelja at darkwing.uoregon.edu
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